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Cronstedtite is not a common mineral but it is not extremely rare and Mindat lists 37 localities (2010). It was recognized as a species since about 1890. By far the best locality for specimens appears to be the Herja mine in Romania.

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Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español. Print or Cut-and-Paste your Pecoraite Specimen Label here :

Cronstedtite - American Mineralogist 24 (1939), 529-539. Publication autors: Hendricks S B, Random structures of layer minerals as illustrated by cronstedtite (2FeO.Fe2O3.SiO2.2H2O). Englische Seiten. Mindat - suche nach: Cronste 11 Sep 2020 Cronstedtite-270286.jpg ‎(400 × 347 pixels, file size: 52 KB, MIME type: image/ jpeg) Source, http://www.mindat.org/photo-270286.html. Several polytypes are known (see Crystallography section). Recently a new non- MDO polytype, 6T2, was discovered in Pohled, Czech Republic (Hybler et al., 4 Dec 2019 6(PO4)4(OH)8·4H2O], crandallite [CaAl3(PO4)2(OH)5·H2O], cronstedtite.

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Mineral Data. Fe2+2Fe3+((Si,Fe3+)2O5)( OH)4. by roxana lara. Excellent sphere of Cronstedtite, with small sphere of Marcasite , Locality: Spain Minerals And. Saved from mindat.org.

cronstedtite cron"stedt*ite (krŏn"stĕt*īt), n. (Min.) A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- so …

English: Cronstedtite Locality: Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures County, Romania (Locality at mindat.org) Size: 3.5 x 2.3 x 1.8 cm. Cronstedtite is a rare iron silicate of the serpentine group.

Cronstedtite mindat

(2) the sample locality. For most samples, I've added a link to the location description on mindat.org, which provides useful additional information on associated 

Cronstedtite mindat

Find details about any mineral at https://www.mindat.org/. 21499, pending, Cronstedtite, kaolinite-serpentine group, England, Cornwall. S'appelle maintenant Tetra-Ferri- annite; sa formule est K(Fe++)3Fe+++Si3O10( OH2, d'après [3377] à MINDAT, le 06.02.2003.

Cronstedtite mindat

June 2011. Cronstedtite. 1.12. 201. 0.07. Kaolinite-Serpentine Group: Amesite, Antigorite, Baumite, Berthierine, Brindleyite , Caryopilite, Chrysotile, Clinochrysotile, Cronstedtite, Dickite, Mindat.org It is available at: www.wiregrassrockhounds.com.
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Cronstedtite mindat

Cronstedtite is a rare iron silicate of the serpentine group. Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español.

Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh. Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2021, except where stated. Most political … More associated groups of cronstedtite, very fresh Base of the photo 4,5 mm Specimen and photo by Enrico Bonacina This Photo was Mindat.org Photo of the Day - … Cronstedtite-2H2 mineral data, information about Cronstedtite-2H2, its properties and worldwide locations.
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71.01.02c.07 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 3 1 m 3m : Strunz Class: 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - QUT Mineral Atlas

Mineral Data, Mineralienatlas Lexikon, Cronstedtit-6R2. CHARLES A. GEIGER, DIANE L. HENRY, AND S. W. BAILEY - CRYSTAL STRUCTURE OF CRONSTEDTITE-2H2 - Clays and Clay Mindat - search for: Cronstedtite-6R2 Webmineral - search for:Cronstedtite-6R2 Handbook-of-Mineralogy - search for: Cronstedtite-6R2 RRUFF - Raman, XRD and other mineral data - search for: Cronstedtite-6R2 RRUFF - References and PDF downloads - search for: Cronstedtite-6R2 American-Mineralogist-Crystal-Structure-Database - search for Named for Axel Fredrik Cronstedt, Swedish mineralogist and chemist. Cronstedtite is an uncommon mineral that occurs as a hydrothermal product in ore veins in localities in the Czech Republic, Romanis, Germany, France, England, the United States, Mexico, Brazil, and Bolivia, among other minor localities. Mindat ProductsOpen discussion area. I recieved two fine specimens of cronstedtite and I am thinking, that they came from Salsigne.